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Figure 9 Real-time 3-dimensional (3D) visualization of myocardial perfusion. Contrast-enhanced 3D data set obtained in a patient with severe discrete left anterior descending artery stenosis (left). A region in the interventricular septum shows lack of contrast enhancement, indicating a perfusion defect that was supported by abnormal wall motion. This defect was visible in multiple cross-sections (right), allowing easy estimation of its extent.